IDT74AUC164245
CMOS 16-BIT LEVEL SHIFTING BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
CMOS 16-BIT LEVEL SHIFTING
BUS TRANSCEIVER WITH
3-STATE OUTPUTS
FEATURES:
DESCRIPTION:
IDT74AUC164245
• V
DDA AND
V
DDB
= 0.8V - 2.7V
• Inputs/outputs tolerant up to 3.6V
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
• Supports Hot insertion:
• A and B port output drivers: ±9mA @ 2.3V
• Available in TSSOP, TVSOP, and VFBGA packages
APPLICATIONS:
• High performance, low voltage communications systems
• High performance, low voltage computing systems
This 16-bit level shifting bus transceiver is built using advanced CMOS
technology. The AUC164245 is ideal for asynchronous communications
between data buses. The control function implementation minimizes external
timing requirements.
The AUC164245 16-bit level shifting bus transceiver contains two separate
supply rails. The B port is designed to track V
DDB
, which accepts voltages from
0.8V to 2.7V. The A port and control inputs are designed to track V
DDA
, which
accepts voltages from 0.8V to 2.7V. This allows for user-selectable translation
for various level shifting system environments.
This device can be used as one 16-bit transceiver or two 8-bit transceivers.
It allows data transmission from A bus to B bus or from B bus to A bus, depending
on the logic level at the direction-control (DIR) input. The output-enable (OE)
input can be used to disable the device so that the buses are effectively isolated.
This device is fully specified for partial power-down applications using I
OFF
.
The I
OFF
circuitry disables the outputs, preventing damaging current backflow
through the device when it is powered down.
The AUC164245 A and B ports are designed with ±9mA output drivers.
These drivers are capable of driving moderate loads while maintaining high
speed performance.
To ensure the high-impedance state during power up or power down,
OE
should be tied to V
DDA
through a pull-up resistor; the minimum value of the resistor
is determined by the current-sinking capability of the driver.
FUNCTIONAL BLOCK DIAGRAM
1
DIR
1
48
2
DIR
1
OE
24
25
36
13
35
14
33
16
2
OE
1
A
1
47
2
46
2
A
1
1
B
1
2
A
2
3
2
B
1
1
A
2
1
B
2
2
B
2
1
A
3
44
5
2
A
3
1
B
3
2
B
3
0.8V - 2.7V
1
A
4
43
0.8V - 2.7V
2
A
4
32
17
30
19
29
20
27
22
0.8V - 2.7V
6
1
B
4
1
A
5
41
8
40
9
38
11
2
B
4
2
A
5
1
B
5
2
B
5
1
A
6
2
A
6
1
B
6
2
A
7
1
B
7
2
B
6
1
A
7
2
B
7
1
A
8
37
2
A
8
12
26
1
B
8
23
2
B
8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 2003 Integrated Device Technology, Inc.
JANUARY 2003
DSC-5970/20
0.8V - 2.7V
IDT74AUC164245
CMOS 16-BIT LEVEL SHIFTING BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
PINOUT CONFIGURATION
6
1OE
1A2
1A4
1A6
1A8
2A1
2A3
2A5
2A7
2OE
5
NC
1A1
1A3
1A5
1A7
2A2
2A4
2A6
2A8
NC
4
NC
GND
V
DDA
GND
GND
V
DDA
GND
NC
3
NC
GND
V
DDB
GND
GND
V
DDB
GND
NC
2
NC
1B1
1B3
1B5
1B7
2B2
2B4
2B6
2B8
NC
1
1DIR
1B2
1B4
1B6
1B8
2B1
2B3
2B5
2B7
2DIR
A
B
C
D
E
F
G
H
J
K
NOTE:
NC = No Internal Connection
VFBGA
56 BALL VFBGA PACKAGE LAYOUT
A
6
5
4
3
2
1
B
C
D
E
F
G
H
J
K
TOP VIEW
2
IDT74AUC164245
CMOS 16-BIT LEVEL SHIFTING BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
1
DIR
1
B
1
1
B
2
ABSOLUTE MAXIMUM RATINGS
FOR V
DDA
OR V
DDB
(1)
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1
OE
1
A
1
1
A
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Symbol
V
TERM
V
TERM
Description
Terminal Voltage with Respect to GND
(all input and V
DD
terminals)
Terminal Voltage with Respect to GND
(any I/O or Output terminals in high-
impedance or power-off state)
Max
–0.5 to +3.6
–0.5 to +3.6
Unit
V
V
GND
1
B
3
1
B
4
GND
1
A
3
1
A
4
V
TERM
Terminal Voltage with Respect to GND
(any I/O or Output terminals in high or
low state)
–0.5 to +3.6
V
V
DDB
1
B
5
1
B
6
V
DDA
1
A
5
1
A
6
T
STG
I
OUT
I
IK
I
OK
I
DD
I
SS
Storage Temperature
Continuous DC Output Current
Continuous Clamp
Current
Continuous Current through
each V
DD
or GND
V
I
> V
DD
V
I
< 0
–65 to +150
±20
+50
–50
–50
±100
°C
mA
mA
mA
mA
GND
1
B
7
1
B
8
2
B
1
2
B
2
GND
1
A
7
1
A
8
2
A
1
2
A
2
Continuous Clamp Current, V
O
< 0
GND
2
B
3
2
B
4
GND
2
A
3
2
A
4
NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
V
DDB
2
B
5
2
B
6
V
DDA
2
A
5
2
A
6
GND
2
B
7
2
B
8
2
DIR
GND
2
A
7
2
A
8
2
OE
2.5V)
C
IN
C
I/O
CAPACITANCE
(T
A
= +25°C, f = 1.0MHz, V
DDA
or V
DDB
=
Symbol
Parameter
Input Capacitance
(1)
Conditions
V
IN
= V
DD
or GND
Typ.
2.5
6
Max. Unit
4
7
pF
pF
I/O Port Capacitance
(2)
V
I/O
= V
DD
or GND
TSSOP/ TVSOP
TOP VIEW
NOTES:
1. Applies to the Control Inputs.
2. Applies to ports A and B.
PIN DESCRIPTION
Pin Names
xOE
xDIR
xAx
xBx
V
DDA
V
DDB
Description
3-State Output Enable Control Inputs (Active Low)
Direction Control Inputs
(1)
(1)
(2)
(1)
FUNCTION TABLE
(EACH 8-BIT SECTION)
(1)
Inputs
xOE
L
L
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
xDIR
L
H
X
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
Z
A Side Inputs or 3-State Outputs
B Side Inputs or 3-State Outputs
Supply for A port, xOE, xDIR
Supply for B port
NOTES:
1. Powered from V
DDA
.
2. Powered from V
DDB
.
3
IDT74AUC164245
CMOS 16-BIT LEVEL SHIFTING BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
RECOMMENDED OPERATING CHARACTERISTICS
(1)
Symbol
(2)
V
DDX
Parameter
Supply Voltage
V
DDX
= 0.8V
V
DDX
= 1.1V to 1.3V
V
IH
(3)
Input HIGH Voltage Level
V
DDX
= 1.4V to 1.6V
V
DDX
= 1.65V to 1.95V
V
DDX
= 2.3V to 2.7V
V
DDX
= 0.8V
V
DDX
= 1.1V to 1.3V
V
IL
(3)
Input LOW Voltage Level
V
DDX
= 1.4V to 1.6V
V
DDX
= 1.65V to 1.95V
V
DDX
= 2.3V to 2.7V
V
I
V
O
Input Voltage
Output Voltage
Active State
3-State
V
DDX
= 0.8V
V
DDX
= 1.1V
I
OH
HIGH Level Output Current
V
DDX
= 1.4V
V
DDX
= 1.65V
V
DDX
= 2.3V
V
DDX
= 0.8V
V
DDX
= 1.1V
I
OL
LOW Level Output Current
V
DDX
= 1.4V
V
DDX
= 1.65V
V
DDX
= 2.3V
∆t/∆v
T
A
Input Transition Rise or Fall Time
Operating Free-Air Temperature
Test Conditions
(2)
Min.
(2)
0.8
V
DDX
0.65 x V
DDX
0.65 x V
DDX
0.65 x V
DDX
1.7
—
—
—
—
—
0
0
0
—
—
—
—
—
—
—
—
—
—
—
–40
Max.
(2)
2.7
—
—
—
—
—
0
0.35 x V
DDX
0.35 x V
DDX
0.35 x V
DDX
0.7
2.7
V
DDX
2.7
–0.7
–3
–5
–8
–9
0.7
3
5
8
9
5
+85
ns/V
°C
mA
mA
V
V
V
V
Unit
V
NOTES:
1. All unused inputs of the device must be held at V
DD
or GND to ensure proper operation.
2. Where V
DDX
refers to either V
DDA
or V
DDB
, depending on which side output A or B is on.
3. V
IL
,V
IH
limits apply for outputs operating at adjacent voltage ranges. For example, 1.8V V
IL
/V
IH
limits apply for outputs operating at 1.5V or 2.5V.
4
IDT74AUC164245
CMOS 16-BIT LEVEL SHIFTING BUS TRANSCEIVER WITH 3-STATE OUTPUTS
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (A PORT OR B
PORT)
(1)
Following Conditions Apply Unless Otherwise Specified:
Operating Conditions: T
A
= –40°C to +85°C
Symbol
I
IH
I
IL
I
OFF
I
OZH
(3)
I
OZL
(3)
I
DDL
I
DDH
I
DDZ
NOTES:
1. All unused inputs of the device must be held at V
DD
or GND to ensure proper operation.
2. Where V
DDX
refers to either V
DDA
or V
DDB
, depending on which side output A or B is on.
3. For the I/O ports, the parameters I
OZH
and I
OZL
include the input leakage current.
Parameter
Input HIGH or LOW Current Data Inputs
Control Inputs
Input/Output Power Off Leakage
High Impedance Output Current
(3-State Output Pins)
Quiescent Power Supply Current
Test Conditions
(2)
V
DDX
= 2.7V, V
I
= V
DDX
or GND
V
DDX =
0V, V
IN or
V
O
≤
2.7V
V
DDX
= 2.7V
V
DDX
= 0.8V to 2.7V
V
IN
= GND or V
DDX
V
O
= V
DDX
V
O
= GND
Min.
(2)
—
—
—
—
—
—
Typ.
(2)
—
—
—
—
—
—
Max.
(2)
±10
±5
±10
±10
±10
20
Unit
µA
µA
µA
µA
OUTPUT DRIVE CHARACTERISTICS (A PORT OR B PORT)
Symbol
Parameter
Test Conditions
(1,6)
V
DDX
= 0.8V - 2.7V
V
DDX
= 0.8V
V
DDX
= 1.1V
(2)
V
DDX
= 1.4V
(3)
V
DDX
= 1.65V
(4)
V
DDX
= 2.3V
(5)
V
DDX
= 0.8V - 2.7V
V
DDX
= 0.8V
V
DDX
= 1.1V
(2)
V
DDX
= 1.4V
(3)
V
DDX
= 1.65V
(4)
V
DDX
= 2.3V
(5)
I
OH
= –100µA
I
OH
= –0.7mA
I
OH
= –3mA
I
OH
= –5mA
I
OH
= –8mA
I
OL
= –9mA
I
OL
= 100µA
I
OL
= 0.7mA
I
OL
= 3mA
I
OL
= 5mA
I
OL
= 8mA
I
OL
= 9mA
Min.
(6)
V
DDX
- 0.1
—
0.8
1
1.2
1.8
—
—
—
—
—
—
Typ.
—
0.55
—
—
—
—
—
0.25
—
—
—
—
Max.
(6)
—
—
—
—
—
—
0.2
—
0.3
0.4
0.45
0.6
Unit
V
OH
Output HIGH Voltage
V
V
OL
Output LOW Voltage
V
NOTES:
1. V
IL
and V
IH
must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS table for the appropriate V
DD
range. T
A
= -40°C to +85°C.
2. Demonstrates operation for nominal V
DDA
or V
DDB
= 1.2V.
3. Demonstrates operation for nominal V
DDA
or V
DDB
= 1.5V.
4. Demonstrates operation for nominal V
DDA
or V
DDB
= 1.8V.
5. Demonstrates operation for nominal V
DDA
or V
DDB
= 2.5V.
6. Where V
DDX
refers to either V
DDA
or V
DDB
, depending on which side output A or B is on.
5
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